Definition of: polyphonic

(pol′i·fon′ik)adjective1.Phonet. Representing more than one sound or combination of sounds, as some written characters.2. Consisting of many sounds or voices.3.Musica Designating or involving the simultaneous and harmonious combination of two or more independent parts or melodies. b Denoting an instrument, as a piano, by which two or more sounds may be produced simultaneously.Also po·lyph·o·nous (pə·lif′ə·nəs).[<Gk. polyphōnos having many tones <poly- many + phōnē a voice, sound]